Evidence tools

Keep the question, observation, and decision connected.

Choose a branch or move

• Evidence Sentence

  One written line, set down before you look at the evidence, that names your claim, the strongest competing explanation, the check you will run, and what you will do for each possible result.

  Use this move →Explore 5 parts →
• Evidence Contract

  Before you gather any data, write down on one page what decision it serves, what the competing explanations predict, and what result would change your mind.

  Use this move →Explore 9 parts →
• Prediction & Evidence Ledger

  Write down what you expect to happen, and when, before you look, then log what actually happened next to it, so you can tell whose explanation was right instead of arguing from memory.

  Use this move →Explore 6 parts →
• Measurement Card

  A Measurement Card is a one-page form you fill in before reporting a number, pinning down exactly what it counts, on whom, over what period, and what it cannot prove.

  Use this move →Explore 10 parts →